Varian Associates

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CARVER LABORATORY PRESS

10 «

V a c l o n pump only

V a c l o n pump plus titanium sublimation pump

10'

Standard For Research . . . solves the pressing problem of forming KBr Pellets Many insoluble materais, mixed with Potassium Bromide, can be formed in a die under pressure: into pellets or wafers for quantitative and qualitative analysis: The CLP supplies the pressure'— up to 40,000 lbs., if needed, : ! r

This specific use is only lone'of'the; ways this versatile laboratory assist arrt meets the challenged research and development. • Some of the many

uses a r e :

> * Dehydrating l*«* Pressing out various ails, stéarines and waxes : * < * Pressure filtering et thick. fluids file* Compression tests i i > ' Fatty acid determinations Ν ; l i ^ Plastic maiding, farming and Moçfttn| I ;:*«*' Embossing and forcing; l|M'' Pressing mother litjuorslfrom crystals '$*?• Extracting Vaccines ma Viruses The Standard (12-ton) CARVER LA80M* r TORY PRESS complete 'wild: Gauge $345.00 : (illustrated) I 20 Ton Models also available u additional I Standard Accessories for other applications can be supplied. Send for latest

HYDRAULIC RIVER

2

4 6

(log scale)

ion pumping plus Ti sublimation pumping Fresh titanium readily reacts with active gases to form stable compounds. Such action may be used to capture or pump gas molecules in vacuum systems. In the Varian scheme fresh titanium is provided by sublimating it from heated filaments inside the vacuum system. The resulting titanium film forms a getter surface on walls giving a pumping speed of 10-15 liters/second/square inch for typical active gases. • Inert gases are present in smaller amounts, but they, too, must be removed if high vacuum is to be achieved. It is to handle these non-getterable gases, such as He, A and methane, that a Vaclon® Pump is used. When a sublimation pump is included with a relatively small Vaclon Pump in a system, clean vacuum and low pressures are obtained quickly (see the comparative pump-down curves above). Cost is low, much lower than if you had to do the whole pumping job with an ion pump alone. • Write for more information. Vaclon^. is a registered trademark of Varian Associates

bulletin.

FRED S. CARVER INC. 54

HOURS

ROAD,

EQUIPMENT SUMMIT.

N.

C i r c l e No. 37 on Readers' Service Card

J.

VARIAN

A S S O C I A T E S PALO ALTO, C A L I F . VACUUM PRODUCTS DIVISION

VARIAN A. G.; ZUG, SWITZERLAND Circle No. 197 on Readers' Service Card

VOL. 35, NO. 10, SEPTEMBER 1903

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177 A